JP4843844B2 - 光ヘッド、受発光素子、及び光記録媒体記録再生装置 - Google Patents
光ヘッド、受発光素子、及び光記録媒体記録再生装置 Download PDFInfo
- Publication number
- JP4843844B2 JP4843844B2 JP2000349227A JP2000349227A JP4843844B2 JP 4843844 B2 JP4843844 B2 JP 4843844B2 JP 2000349227 A JP2000349227 A JP 2000349227A JP 2000349227 A JP2000349227 A JP 2000349227A JP 4843844 B2 JP4843844 B2 JP 4843844B2
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- Japan
- Prior art keywords
- light
- recording medium
- optical recording
- optical
- spot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
- G11B11/10541—Heads for reproducing
- G11B11/10543—Heads for reproducing using optical beam of radiation
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
- G11B7/0912—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by push-pull method
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/131—Arrangement of detectors in a multiple array
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/133—Shape of individual detector elements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1359—Single prisms
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
- G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive elements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
- G11B7/13927—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means during transducing, e.g. to correct for variation of the spherical aberration due to disc tilt or irregularities in the cover layer thickness
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1395—Beam splitters or combiners
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000349227A JP4843844B2 (ja) | 1999-12-27 | 2000-11-16 | 光ヘッド、受発光素子、及び光記録媒体記録再生装置 |
PCT/JP2000/009327 WO2001048749A1 (fr) | 1999-12-27 | 2000-12-27 | Tete optique, dispositif emetteur/recepteur de lumiere et appareil d'enregistrement lecture sur un support optique |
EP00987759A EP1170739B1 (de) | 1999-12-27 | 2000-12-27 | Optischer kopf, lichtemittierende/ lichtempfindliche vorrichtung und aufzeichnungs-/ wiedergabegeraet fuer optische media |
AU24033/01A AU2403301A (en) | 1999-12-27 | 2000-12-27 | Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium |
KR1020017010881A KR100691661B1 (ko) | 1999-12-27 | 2000-12-27 | 광 헤드, 수발광 소자 및 광 기록 매체 기록 재생 장치 |
US09/914,350 US6940789B2 (en) | 1999-12-27 | 2000-12-27 | Optical pickup device that corrects the spot shape of reflected light beams |
DE60027143T DE60027143T2 (de) | 1999-12-27 | 2000-12-27 | Optischer kopf, lichtemittierende/ lichtempfindliche vorrichtung und aufzeichnungs-/ wiedergabegeraet fuer optische media |
CN00806832A CN1130709C (zh) | 1999-12-27 | 2000-12-27 | 光学头、光收发器件及光记录介质记录再生装置 |
US11/124,071 US7095687B2 (en) | 1999-12-27 | 2005-05-09 | Optical pickup device that corrects the spot shape of reflected light beams |
US11/494,565 US7319644B2 (en) | 1999-12-27 | 2006-07-28 | Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP37055499 | 1999-12-27 | ||
JP11-370554 | 1999-12-27 | ||
JP1999370554 | 1999-12-27 | ||
JP2000349227A JP4843844B2 (ja) | 1999-12-27 | 2000-11-16 | 光ヘッド、受発光素子、及び光記録媒体記録再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2002092932A JP2002092932A (ja) | 2002-03-29 |
JP4843844B2 true JP4843844B2 (ja) | 2011-12-21 |
Family
ID=26582235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000349227A Expired - Fee Related JP4843844B2 (ja) | 1999-12-27 | 2000-11-16 | 光ヘッド、受発光素子、及び光記録媒体記録再生装置 |
Country Status (8)
Country | Link |
---|---|
US (3) | US6940789B2 (de) |
EP (1) | EP1170739B1 (de) |
JP (1) | JP4843844B2 (de) |
KR (1) | KR100691661B1 (de) |
CN (1) | CN1130709C (de) |
AU (1) | AU2403301A (de) |
DE (1) | DE60027143T2 (de) |
WO (1) | WO2001048749A1 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4843844B2 (ja) * | 1999-12-27 | 2011-12-21 | ソニー株式会社 | 光ヘッド、受発光素子、及び光記録媒体記録再生装置 |
JP2003248960A (ja) * | 2002-02-25 | 2003-09-05 | Sony Corp | 光学ピックアップ及びディスクドライブ装置 |
TW200306550A (en) * | 2002-03-29 | 2003-11-16 | Matsushita Electric Ind Co Ltd | Optical pick-up apparatus and optical disc apparatus |
KR100468739B1 (ko) * | 2002-06-20 | 2005-01-29 | 삼성전자주식회사 | 모니터 광검출기를 구비하는 광픽업 |
JP2004281026A (ja) | 2002-08-23 | 2004-10-07 | Matsushita Electric Ind Co Ltd | 光ピックアップヘッド装置及び光情報装置及び光情報再生方法 |
US7437053B2 (en) * | 2003-01-15 | 2008-10-14 | Matsushita Electric Industrial Co., Ltd. | Digital video recorder, method of driving the video recorder and program |
JP3786367B2 (ja) * | 2003-06-25 | 2006-06-14 | 船井電機株式会社 | 光ピックアップ装置 |
WO2005101393A1 (ja) * | 2004-04-13 | 2005-10-27 | Konica Minolta Opto, Inc. | 光ピックアップ装置用の対物光学系、光ピックアップ装置、光情報記録媒体のドライブ装置、集光レンズ、及び光路合成素子 |
JP2006048794A (ja) * | 2004-08-02 | 2006-02-16 | Sony Corp | 光学ピックアップ装置、光記録再生装置及び光記録再生方法 |
JP2006120211A (ja) * | 2004-10-20 | 2006-05-11 | Sony Corp | 光ピックアップ、光ディスク装置、光検出装置および光ピックアップの信号生成方法 |
JP2006155707A (ja) * | 2004-11-26 | 2006-06-15 | Enplas Corp | 光ピックアップ装置および光学素子 |
US20060285231A1 (en) * | 2005-05-24 | 2006-12-21 | Matsushita Electric Industrial Co., Ltd. | Optical component and optical pickup device |
JPWO2007023650A1 (ja) * | 2005-08-22 | 2009-02-26 | 日本電気株式会社 | 光ヘッド装置及び光学式情報記録又は再生装置 |
JP2008071385A (ja) * | 2006-09-12 | 2008-03-27 | Nidec Sankyo Corp | 光ヘッド装置 |
JP4996353B2 (ja) * | 2007-06-05 | 2012-08-08 | パナソニック株式会社 | 光ピックアップおよび光情報記録再生装置 |
CN101393753A (zh) * | 2007-09-20 | 2009-03-25 | 新科实业有限公司 | 光学头的制造方法 |
JP5126074B2 (ja) * | 2008-07-11 | 2013-01-23 | 株式会社Jvcケンウッド | 光ピックアップ及び光デバイス |
JP4770915B2 (ja) * | 2008-11-17 | 2011-09-14 | パナソニック株式会社 | 光ピックアップヘッド装置及び光情報装置 |
JP2010210708A (ja) * | 2009-03-06 | 2010-09-24 | Sanyo Electric Co Ltd | ビーム照射装置および位置検出装置 |
JP2011044206A (ja) * | 2009-08-22 | 2011-03-03 | Sony Corp | 光ピックアップ及び光ディスク装置 |
CN114361929B (zh) * | 2021-12-30 | 2024-04-19 | 北京大学 | 一种提高多通激光放大器稳定性的指向性监测系统及方法 |
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JPH0627907B2 (ja) * | 1983-02-16 | 1994-04-13 | 株式会社日立製作所 | 光学的情報処理装置 |
JPS60229007A (ja) * | 1984-04-27 | 1985-11-14 | Matsushita Electric Ind Co Ltd | 非等方的光スポツト形成方法 |
JPS6478442A (en) | 1987-09-18 | 1989-03-23 | Sanyo Electric Co | Optical pickup device |
JPH01179235A (ja) | 1987-12-29 | 1989-07-17 | Fuji Xerox Co Ltd | 光情報記録装置の情報消去装置 |
JPH01258240A (ja) | 1988-04-07 | 1989-10-16 | Sharp Corp | 光学的情報読取り装置 |
JPH01260636A (ja) * | 1988-04-12 | 1989-10-17 | Konica Corp | 焦点検出方法 |
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CA2012401C (en) * | 1989-05-26 | 1994-05-10 | Anthony G. Dewey | Focus-error detection using prism-enhanced spot size monitoring |
JP2699986B2 (ja) * | 1990-04-20 | 1998-01-19 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | 光ヘッドの焦点誤差を検出するための装置 |
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-
2000
- 2000-11-16 JP JP2000349227A patent/JP4843844B2/ja not_active Expired - Fee Related
- 2000-12-27 US US09/914,350 patent/US6940789B2/en not_active Expired - Fee Related
- 2000-12-27 KR KR1020017010881A patent/KR100691661B1/ko not_active IP Right Cessation
- 2000-12-27 AU AU24033/01A patent/AU2403301A/en not_active Abandoned
- 2000-12-27 DE DE60027143T patent/DE60027143T2/de not_active Expired - Lifetime
- 2000-12-27 EP EP00987759A patent/EP1170739B1/de not_active Expired - Lifetime
- 2000-12-27 WO PCT/JP2000/009327 patent/WO2001048749A1/ja active IP Right Grant
- 2000-12-27 CN CN00806832A patent/CN1130709C/zh not_active Expired - Fee Related
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2005
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Also Published As
Publication number | Publication date |
---|---|
EP1170739B1 (de) | 2006-04-05 |
KR100691661B1 (ko) | 2007-03-09 |
US7095687B2 (en) | 2006-08-22 |
CN1130709C (zh) | 2003-12-10 |
US20020114229A1 (en) | 2002-08-22 |
US20060262700A1 (en) | 2006-11-23 |
JP2002092932A (ja) | 2002-03-29 |
AU2403301A (en) | 2001-07-09 |
DE60027143D1 (de) | 2006-05-18 |
EP1170739A1 (de) | 2002-01-09 |
KR20010112289A (ko) | 2001-12-20 |
US20050201220A1 (en) | 2005-09-15 |
DE60027143T2 (de) | 2006-12-21 |
CN1349645A (zh) | 2002-05-15 |
EP1170739A4 (de) | 2003-01-02 |
US7319644B2 (en) | 2008-01-15 |
US6940789B2 (en) | 2005-09-06 |
WO2001048749A1 (fr) | 2001-07-05 |
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